Remove the spark plugs so there will not be any compression and squirt some penetrating oil in the cylinders.

Let is sit a day or two and try again to turn the engine with a wrench on the crankshaft. It will need to be a fairly good sized bar on the wrench for leverage with a new engine (approx 2 ft). Will probably have to make small movements back and forth while adding penetrating oil then finally it will turn all the way around. Don't force it to turn completely the first time - although unlikely - that could break a ring.

If you can't turn the engine with a wrench it's most likely going to have to be removed to be freed. I'm sure other folks will have more suggestions on freeing it up. Some may suggest acetone and transmission fluid 50/50 mix as a rust breaker - I've never tried it but heard it works better than the penetrating oil.

I bought a rebuilt engine that had sat a few years. It was sealed but moisture still made it's way into the engine. I could however turn it with a wrench. Later found that all the hydraulic lifters were frozen and had to replace them. Hopefully yours is just a little rust in the cylinders and will move with the penetrating oil.

Inside the engine - notice the rust around the lifters

After removing the intake manifold, cleaning everything and replacing the lifters and pushrods.

If you do get it moving check the battery. Batteries can have enough voltage to light bulbs and engage the starter but basically no current (shorted cells etc).

Hopefully the engine was covered or wrapped in something so no mice or moisture could get inside during storage.

Before tearing anything apart I would just remove the spark plugs and squirt a lot of a high quality penetrating oil in each plug hole. Let it set for a day and then with a socket on the crankshaft bolt I would try to turn it back and forth a little bit. This may not work, but definitely worth a try. If it moves some, keep rocking and hopefully it will soon break free. Once free, turn it over with the wrench several times before trying the starter.

If the previous suggestions don't work try taking the valve covers off and remove the rocker arms so you're not trying to move the valves. They may be stuck also. You want as little resistance as possible.

Driving, racing or working on cars can be hazardous. The procedures and advice on this website including the message board are opinion only. Squarebirds.org and its webmasters and contributors do not guarantee the correctness of the advice and procedures. The Squarebirds.org and its webmasters assume no liability for any damage, fines, punishment, injury or death resulting from following these procedures or advice. If you do not have the skills or tools to repair your car, please consult a professional. By using this site you agree to hold harmless the Squarebirds.org, its authors and its webmasters from any resulting claim and costs that may occur from using the information found on this site.

Any submissions to this site and any post on this site becomes property of Squarebirds.org . The webmasters reserve the right to edit and modify any submissions to this site. All material on this is site is copyrighted by the Squarebirds.org. Reproduction by any means other than for personal use is strictly prohibited. Permission to use material on this site can be obtained by contacting the webmasters. Copyright 2002-2016 by Squarebirds.org.